Rubber heel



i Se 291-1925.

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' A f ,[zvenf?" Patented Sept. 29, 1925.

)UNITED STATES PATENT carica.

PETER C. NIEMANN, OF WEST NEWTON, MASSACHUSETTS.

RUBBER HEEL.

Application filed January 8, 1923. Serial No.611,313.

resident of West Newton, in the county of- Middlesex and State of Massachusetts, have invented a new and useful Improvement in Rubber Heels, of which the following is a specification. l

My invention relates to resilient heel lifts, and its object is to improve the shape of such lift so as to avoid the defects inherent in flat lifts and provide a lift that may be attached to a shoe with the minimum number of nails, screws or other attaching means.

`My invention consists in a heel lift of rubber or other suitable resilient material which is generally concavo-convex in form, but which has a central elevation on its attaching face lying immediately within the line of openings for the heel-attaching means, and a diametrically opposite depression on its tread surface, so that the edge portion of its attaching face is concave and the central portion thereof convex, while the edge portion of its tread surface is convex, and the central portion thereof concave.

As is well understood, concavo-convex resilient heel lifts require a series of nails or other attaching means passing through the longitudinal axis thereof in order to flatten the lift to the heel of the shoe, but by vmeansof the construction herein described, I am enabled to eliminate the use of such nails, the lift being flattened to the shoe heel by a series of nails arranged immediately outside the limits of the depression formed in the tread surface and the projection or elevation formed on the attaching face.

One embodiment of my invention is shown in.the accompanying drawings in which,

Figure 1 is a plan view of a resilient heel lift embodying my invention;

Fig. 2 is a transverse section on the line 2 2;

Fig. 3 is a medial longitudinal section on the line 3-3;

Fig. 4 is a transverse section taken on the line LiL- 4, showing the lift attached to the heel of the shoe.

In the particular drawings selected for more fully illustrating my invention, 10 represents the concave edgejportion ofthe at.- tachingface, `of a lift ,of yrubber or .other suitable resilient material, .and .fit1 `is the,

central `projection `or elevation formed uon said face, said elevation or projection ibeing convex in transverse section and straight in each of its longitudinal sections, and eX- tending to the breast edge of the lift.

Preferably the surface of said central portion at its longitudinal medial section 12 lies in the plane passing through the edge of the heel and the breast corners.

The tread surface is provided with a depression 13 directly opposite the central portion 11, and said depression is concave on each of its transverse sections and straight or level on each of its longitudinal sections. The edge portion of the tread sur face is convex as shown at 14.

The convex portion 11 and the concave portion 13 lie immediately within the line.

of openings 15 for the nails, screws or other heel-attaching means, and preferably the usual washers are employed as indicated at 16. When the lift is attached to the shoe heel 17 as by nails 18, the concave edge portions 10 of the attaching surface are flattened out against the surface of the heel, and the convex portion 11 is compressed against said heel so that the entire attaching surface` becomes plane, as indicated in Fig. 4, while at the same time the compression exerted on the elevation 11 acting through the body of the lift serves to iill in the depression 13, and the curvature of the edge portions 14 being attened by the action of the nails, the tread surface becomes parallel to the attaching face of the lift.`

It will be obvious that by means of the present invention the lift may be quickly attached to the shoe heel, for the longitudinally disposed nails necessary for attaching a concavo-convex lift are eliminated.

Having thus described an illustrative embodiment of my invention without however limiting the same thereto, what I claim and desire to secure by Letters Patent is c# i 1. A resilient heel lift having the edge portion of its attaching face concave, and the centralportion thereof convex in trans verse section and straight in each of its longitudinalsections and extending to the breast edge of the lift, the edge portionof its tread surface being convex, and the the central portion thereof convexin'tran's" verse section and straight 1n each of its Y longitudinal sections and extending to the breast edge of the lift,ithe surface of said central portion at its longitudinal medial section lying in the plane passing throughj the edge and the breast cornersof the lift, and the edge portion of its tread being con#` veX and y the central portion thereof concave,- 'f

3. A resilient heel lift having the edge portion of its attaching face concave and the central'portion thereof convex, the said central portion lying immediately Within the line of openings for the. heel-attaching meansand'extending tothe breast edge of the lift, and the edge portion of its tread surface being convex and the central portion ythereof concave in transverse section and straight in each of its longitudinal sec# tions. v 1 A In testimony whereof, .I have hereunto subscribed my name .this 30th day of De' 

